This is how Pohatu's Corruption goes in The Return of Harmony Part 1.
[Pohatu wanders around]
Pohatu: I was expecting an audience with the Princess, not outdoor sports. [crystals appear beside him] Agh. Oh my...
[The Lord of Skull Spiders appears]
Lord of Skull Spiders: [laughing] Welcome to your lucky day, Pohatu. You've found the one thing in Equestria that could rival my face for sheer beauty. What do you think? You like?
[He looks on]
Pohatu: Yes... I like very much... [moves off] No! No, I shan't succumb to such fabulousness. Must... get to the center... to meet... the others. [grunt]
[However, the spell takes him over]
Pohatu: Mine! [grunts] Well, Pohatu. It took forever, but it was worth it. Who knew three little gemstones would turn out to be this handsome hunk of a diamond? Now to get you home. [grunts]
[Tahu, Lewa, and Onua arrive]
Tahu: Pohatu! Are we glad to see... Why are you carrying a humongous boulder?
Pohatu: What do you mean, "boulder"? This big beautiful bedazzling rock is a diamond! And it's all mine. Keep your envious little eyes off it! I found it and it's mine fair and square! [grunting]
[Tahu looks puzzled]